/*jshint camelcase:false*/
var cwd = process.cwd();
var fs = require('fs');
var util = require('../../common/util');

module.exports = function (app) {
    // js duck mobile

    var docsDir = cwd + '/docs/';

    function file_get_contents(f) {
        return fs.readFileSync(docsDir + f, {
            encoding: 'utf-8'
        });
    }

    function print_page(req, res, $subtitle, $body, $fragment) {
        var $uri = req.protocol + '://' + req.host + req.path;
        var $canonical = $uri + '#!' + $fragment;
        var $html = file_get_contents('print-template.html');
        res.send(util.substitute($html, {
            subtitle: $subtitle,
            body: fix_links($body),
            canonical: $canonical
        }));
    }

    function print_index_page(res) {
        res.send(fix_links(file_get_contents('index-template.html')));
    }

    function jsonp_decode($jsonp) {
        return JSON.parse($jsonp.replace(/^.*?\(/, '')
            .replace(/\);\s*$/, ''));
    }

    function decode_file($filename) {
        if (fs.existsSync(docsDir + $filename)) {
            return jsonp_decode(file_get_contents($filename));
        } else {
            throw new Error('File ' + $filename + ' not found');
        }
    }

    // Turns #! links into ?print= links when in print mode.
    // <a href="#!/api/Ext.Element">  -->  <a href="?print=/api/Ext.Element">
    // <a href="#!/api/Ext.Element-cfg-id">  -->  <a href="?print=/api/Ext.Element#cfg-id">
    function fix_links($html) {
        var $param = 'mobile';
        return $html
            .replace(/<a href=(['"])#!?\/(api\/[^-'"]+)-([^'"]+)/g,
                '<a href=' + '$1?' + $param + '=/$2#$3')
            .replace(/<a href=(['"])#!?\/guide\/([^-'"]+)-section-([^'"]+)/g,
                '<a href=' + '$1?' + $param + '=/guide/$2#$2-section-$3')
            .replace(/<a href=(['"])#!?\//g,
                '<a href=' + '$1?' + $param + '=/');
    }

    app.get('/kissy/docs/', function (req, res) {
        var ua = req.get('User-Agent'),
            $fragment,
            $json,
            query = req.query;
        if ('print' in query) {
            query.mobile = query.print;
        }
        if ('mobile' in query) {
            $fragment = query.mobile || '';
        } else if (
            /(android|bb\d+|meego).+mobile|avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\.(browser|link)|vodafone|wap|windows (ce|phone)|xda|xiino/i
                .test(ua) ||
                /1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\-(n|u)|c55\/|capi|ccwa|cdm\-|cell|chtm|cldc|cmd\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\-s|devi|dica|dmob|do(c|p)o|ds(12|\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\-|_)|g1 u|g560|gene|gf\-5|g\-mo|go(\.w|od)|gr(ad|un)|haie|hcit|hd\-(m|p|t)|hei\-|hi(pt|ta)|hp( i|ip)|hs\-c|ht(c(\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(20|go|ma)|i230|iac( |\-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc\-|kyo(c|k)|le(no|xi)|lg( g|\/(k|l|u)|50|54|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\-2|po(ck|rt|se)|prox|psio|pt\-g|qa\-a|qc(07|12|21|32|60|\-[2-7]|i\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\-|oo|p\-)|sdk\/|se(c(\-|0|1)|47|mc|nd|ri)|sgh\-|shar|sie(\-|m)|sk\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\-|v\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\-|tdg\-|tel(i|m)|tim\-|t\-mo|to(pl|sh)|ts(70|m\-|m3|m5)|tx\-9|up(\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|yas\-|your|zeto|zte\-/i
                    .test(ua.substr(0, 4))
            ) {
            $fragment = '';
        }
        if ($fragment !== undefined) {
            var $m;
            if (($m = $fragment.match(/^\/api\/([^-]+)/))) {
                var $className = $m[1];
                $json = decode_file('output/' + $className + '.js');
                print_page(req, res, $className, '<h1>' + $className + '</h1>\n' + $json.html, $fragment);
            } else if (($m = $fragment.match(/^\/api\/?$/))) {
                print_index_page(res);
            } else if (($m = $fragment.match(/^\/guide\/(.+?)(-section-.+)?$/))) {
                $json = decode_file('guides/' + $m[1] + '/README.js');
                print_page(req, res, $json.title, '<div class="guide-container" style="padding: 1px">' + $json.guide + '</div>', $fragment);
            } else {
                print_index_page(res);
            }
        } else {
            res.send(file_get_contents('template.html'));
        }
    });

};